TOUCH PANEL SWITCH

• US 20130307819A1
• Filed: 05/01/2013
• Published: 11/21/2013
• Est. Priority Date: 05/18/2012
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Original Assignee: Kabushiki Kaisha Tokai RIKA Denki Seisakusho
• Inventors: SHIMIZU, Tomomi, SHIGEMATSU, Yuichiro
• Application Number:
  US13/874,565
• Publication Number:
  US 20130307819A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

A touch panel switch includes a panel base including an operation surface on a front side thereof, a first electrode formed on a back side of the panel base, and a second electrode formed along the operation surface.

Claims

1. A touch panel switch, comprising:

a panel base comprising an operation surface on a front side thereof;

a first electrode formed on a back side of the panel base; and

a second electrode formed along the operation surface.

2. The touch panel switch according to claim 1, wherein an electrode area of the second electrode is set to be smaller than an electrode area of the first electrode and larger than a contact area of an object to be detected that is in contact with the operation surface.

3. The touch panel switch according to claim 1, wherein the second electrode is formed on or under the operation surface.

4. The touch panel switch according to claim 1, wherein a distance between the object to be detected in contact with the operation surface and the second electrode is set to be less than a distance between the first and second electrodes.

5. The touch panel switch according to claim 1, wherein the operation surface comprises a raised portion.

6. The touch panel switch according to claim 5, wherein the second electrode is formed convex along the raised portion.

7. The touch panel switch according to claim 1, wherein a capacitance formed between the first electrode and the second electrode is set to be less than a capacitance formed between the second electrode and a fingertip of an operator.

8. The touch panel switch according to claim 1, wherein the second electrode is not electrically connected to the first electrode.

9. The touch panel switch according to claim 1, further comprising a flexible wiring board,

wherein the first electrode is formed on the flexible wiring board.

10. The touch panel switch according to claim 1, further comprising a rigid wiring board,

wherein the first electrode is formed on the rigid wiring board.